1930402 has 4 divisors (see below), whose sum is σ = 2895606. Its totient is φ = 965200.

The previous prime is 1930391. The next prime is 1930417. The reversal of 1930402 is 2040391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1846881 + 83521 = 1359^2 + 289^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1930402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 482599 + ... + 482602.

2^1930402 is an apocalyptic number.

1930402 is a deficient number, since it is larger than the sum of its proper divisors (965204).

1930402 is an equidigital number, since it uses as much as digits as its factorization.

1930402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965203.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1930402 is about 1389.3890743777. The cubic root of 1930402 is about 124.5133505035.

Adding to 1930402 its reverse (2040391), we get a palindrome (3970793).

It can be divided in two parts, 1930 and 402, that added together give a palindrome (2332).

The spelling of 1930402 in words is "one million, nine hundred thirty thousand, four hundred two".